The Great Food Explo is scheduled to open in Pickax with a bang, introducing new restaurants, country inns and food speciality shops. Unfortunately the 'bang' takes the form of a bomb which wrecks a hotel, killing the housekeeper and causing extensive damage. Enter Qwill and his Siamese cats, Koko and Yum Yum, whose instincts tell them that the murderous bomb was meant as something stronger than a warning to someone.